Mechanism for inserting fastenings.



A. L. BNGBERG. MECHANISM FOR INSERTING FASTENINGS. APPLICATION IILED AUG. 3, 1908.

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1,030,572. Patented June 25, 1912.

ARVID L. ENGBERG, OF LYNN, MASSACHUSETTS, ASSIGNOR 'lO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MECHANISM FOR INSERTING FASTENINGS.

Original application filed June 15, 1907, Serial No. 379,165.

Serial N 0. 446,649.

To all whom it may concern:

Be it known that I, ARvn) L. ENGBERG, a citizen of the United States, residing at Lynn, in the county of Essex and Common wealth of Massachusetts, have invented certain Improvements in Mechanisms for Inserting Fastenings, of which the following description, in connect-ion with the accompanying drawings, is a specification, like reference characters on the drawings inclicating like parts in the several figures.

This invention relates to machines for inserting fastenings and has for an object to provide improved means for controlling the delivery of fastenings While the machine may continue running, and the present ap plication is a division of an application, Ser. No. 379,165, filed June 15,1907.

An important feature of the invention consists in providing means for retaining a tack in transit while the separation of tacks is suspended whereby a tack is ready to be driven when the separation of tacks is resumed. This feature of the invention is particularly useful in machines in which the tack-supplying mechanism is arranged to begin the separation of a tack in one cycle of the machines operation and to present that fastening in position to be driven during a subsequent cycle. If the separated tack which is in transit in mechanisms so arranged is permitted to be driven after the separation is stopped there is no tack ready to be driven during the first cycle of the machine after the separation is resumed so that time is lost in waiting for a tack. Also an operator will usually not suspend the supplying of tacks until the work in hand has been finished so that the tack in transit will be wasted if expelled from the machine. In the illustrated embodiment of the invention in which it is applied to a lasting machine of the type shown in United States Letters Patent No. 58 L744 thetack is separated in one cycle of the machines operation and delivered to a movable tack carrier, which in the next cycle presents the tack in position to be driven. The tack is transferred or discharged from the separator through a vertical passage and I have located a gate in position to close this passage and hold.

Specification of Letters Patent.

Divided and this application filed August 3,

the separation of tacks may be stopped and started. This arrangement has the advantage that no special attention is required for its operation and a tack is always ready to be driven in the first cycle of the machines operation after the work is presented so that no delay occurs in the use of the machine. A further advantage is that there is no waste of tacks by reason of their being driven when the work is not in position to receive a tack.

A further feature of this invention consists in novel means for stopping the feeding of tacks and comprises means for directly engaging the head of the first tack in the raceway, or the one next to the separator, and clamping it against movement into the range of operation of the separator. The preferred construction includes a clamp having a lip for moving cllownwar'd in front of the head of the first tac r and a face for engaging the top of that tack and preferably also the tops of one or more adjacent tacks to prevent them from riding up on one another by reason of the jar of the machine or for any other cause. As shown, this clamp is guided in the usual raceway cover and normally lifted by a spring. An arm connected with the shoe feeler is arranged above the clamp in position to depress it when the feeler is shifted by the withdrawal of the shoe. A desirable characteristic of the present construction is that the tack-stopping means can operate at any time during the cycle of the machines operation, rather than waiting until a predetel-mined time in the operation before it can become effective. The clamp can at any time be depressed upon the endmost tack in the raceway to hold it even if that tack should happen to be in motion toward the separator and the gate will immediately Patented June 25, 1912. i

stop the delivery of tacks through the tack passage, for even if it should strike a tack that was being dropped to the tack carrier it would, by its arrangement transversely of the stem of the tack, stop the progress of that tack.

A further important feature of this invention consists in providing means which is normally arranged to be actuated by the work for controlling the feeding of tacks and is adjustable so that it will not be so actuated. The means shown, which comprises the feeler before mentioned, is adapted to assume automatically a position where it will be engaged and actuated by the work when the shoe is presented in posit-ion to receive a tack. In this position it stops the feeding of tacks. It is customary to fasten the toeportion of some kinds of shoes with wire instead of tacks and when the toe portion of the shoe is presented to the machine it is necessary to stop the feeding of the tacks. This is accomplished in accordance with the present invention by connecting the feeler adj ust-ably or shiftably with the parts operated by it so that the feeler can be turned into a position out of the way of the shoe where it will not be actuated to start the delivery of tacks although the shoe does occupy its tack-receiving position.

These and other features of the invention, including combinations of parts and certain details of construction, will appear in connection with the descriptionof the machine and will then be pointed out in the claims.

Figure 1 is a side elevation of a portion of a lasting and tacking machine with the present invention applied thereto, a shoe being shown in taclrreceiving position and the tacking mechanism in operation. Fig. 2 is a plan view, partly in horizontal section, showing the tack-supplying mechanism and the controlling means therefor. Fig. 3 is a vertical section in the plane of the raceway groove. Fig. 4 is a detail.

The portions of the machine concerned in the present invention comprise an inclined raceway 10 mounted in a suitable frame and having a tack groove 11 upon the opposite sides of which the heads of the tacks rest with their stems suspended in the raceway. The tacks slide along the raceway by gravity, the jarring of the tack-driving mechanism assisting this movement. At the foot of the raceway is located a reciprocating tack separator 14 having a tack seat 13 connected by an inclined groove narrower than the tack head with an enlarged opening 13 suitable for the tack head to pass through. This tack separator includes as an important feature a pointed wedge-shaped finger which enters between the tack in the seat 13 and the first or lowermost tack in the raceway and wedges the separated tack through the groove to remove it from the adjacent tack.

Another feature of this separator is a gate 132 which is shown best in Fig. 3-and closes the end of the raceway groove between the separated tack and the tacks in the raceway, as shown in that figure. These parts of the separator are supported and have sliding movement upon an end block 14 through which is a vertical passage 23 along which the separated tack passes toward the tack carrier The separator and the adjacent end of a lever 16 have interengaging teeth 15 while the rear end of the lever carries a roll 17 which is held by a spring 18 against a cam 19 on areciprocating slide 20. This slide is driven from the main shaft of the machine and while the machine is running it is advanced after each operation of the lasting devices, causing the tack carrier 35 to carry a tack from the tack-receiving position shown in Fig. 3 tothe tack-inserting position under the driver 34, where it is shown in Figs. 1 and 2. The slide has a quick forward movement, pausing just long enough to permit the driver to insert the tack, and then it returns to the position in Fig. 3. In this forward movement, as will be seen from Fig. 2, the cam 19 acts through the lever 16 to move the separator into the position shown in F ig..2 where a tack can enter the seat 13 and in the return movement of slide 20 the spring 18 acts through the lever to drive the separator in the direction to thrust the point of its blade between the seated tack and the first tack in the raceway which is held back by the upper edge of the blade and later by the gate, as shown in Fig. 3, and when the separator reaches a position in which the large opening 13' and the tack are in alinement with the vertical passage 23 in the end block 14 the tack falls toward the tack carrier in the driver passage 36 of which it is supported by the spring fingers 33. As the illustrated machine is arranged this terminates one cycle of the machines operation and a second cycle is begun by the actuation of the last ing devices to work another portion of up per into position to be fastened, after which the tack carrier brings the tack 32 forward under the driver and over the portion of upper which has just been manipulated into position to be fastened. During this advance of the carrier for the insertion of a tack in the second cycle another tack is be ing separated to drop into the carrier on its return to position of rest.

The lever 40, 40 is fulcrumed at 42 and the front end or foot 41, which extends into position to be engaged by the shoe in presenting the work in tack-receiving relation to the machine, is normally held down both by its weight and by the spring 43. In the arrangement shown it is necessary to lift the foot 41 to position the shoe for receiving a tack. A post 44 is pivoted to the lever 40,

4O at 45, is guided in a bracket at 46, and has a lateral arm 59 which overhangs a rod 57 normally uplifted by a spring 58. The rod 57 is guided in the raceway cover, which is recessed to receive the foot 55 of the rod. This foot has a lip 56 which in the normal arrangement of tacks in the raceway will be located just over the front edge of the first tack in the raceway in position when depressed to descend vertically in front of and form an abutment to stop the passage of that tack down the raceway into the tack seat 13 of the separator. If the tacks do not come so that the lip 56 takes its normal position in front of the first tack it will descend upon the head of that tack and clamp it. The foot 55 is, however, provided with a plane lower face which, when the lip 56 finds its normal position in front of the first tack, clamps upon the head of the first tack and preferably upon several of the adjacent tacks, holding them all from working downwardly and also from climbing up on one another as they have a tendency to do by reason of the vibration of the machine. The bracket 46 compels the post 44 to move in a predetermined vertical path and this post has a laterally projecting arm 62 having an inclined slot 61 that receives a stud on the outer end of a gate which is in the form of a horizontal sliding plate adapted to be projected across the tack passage 23, as shown in Fig 3, to arrest the tack that is in transit from the separator to the tack carrier and thus prevent that tack from being driven in the next cycle of the machines operation as would otherwise be done. The control of the tack clamp 55 and the gate 60 from the same feeler 40, 41 insures their operation in unison and this operation may take place at any instant in the machines cycle. The removal of the shoe from tack-receiving position causes the gate 60 to intercept the tack which is always either in the separator or in transit to the carrier and causes the clamp 55, 56 to stop another tack from entering the seat of the separator. The presentation of the shoe will reversely actuate the parts, withdrawing the gate to permit the tack 32, Fig. 3, to

, fall into the tack carrier at the next presentation of the opening 36 in alinementwith passage 23 and lifting the clamp to permit the first tack to enter the seat 13 in the separator when the seat is presented thereto at the same time that the tack 32 is carried to driving position, as in Fig. 2.

The two parts of the lever 40, 40 are pivoted together at 45 and the part 40 has a forwardly projecting lug 48 that engages the member 40 and forms an abutment through which motion is transmitted from 40 to 40 and the parts controlled by them. The member 40 which constitutes or on which is carried the feeler can be turned downward into the dotted-line position shown in Fig. las, for example, when it is desired to suspend entirely the driving of tacks and fasten the upper with wire. A

spring plunger 49 in the member 40 engages inclined faces 011 the pivot pin 45, as shown in Fig. 1, to retain the member 40 against accidental dislodgment from its adjusted position. The feeler 40, 41 may form, or take the place of, the usual bottom rest of the machine, in which case it should be locked in its depressed operative position instead of being turned down while the toe is being lasted and fastened with wire. To permit this to be done the machine is provided with a locking device indicated at 50 so arranged that the rest 40, 41 can be locked in its depressed position and also, if desired, in its raised position in which it would be inoperative to stop the tacks.

The locking device 50 comprises a pivot ed block shown in a neutral or inoperative position in Fig. 1 and adapted to be turned upwardly under a stud that projects from the post 44 to lock the postup and thereby prevent the rest 40, 41 from being moved downwardly by the spring 43. The locking device can be turned downwardly against a second stud on the post to lock the parts agailnst being raised by the pressure of the WOI'L The form and arrangement of the rest 40,

41 by which it approaches the shoe engaging point, as indicated in Fig. 4, from the direction of the feed, or from the side of the unlasted portion of upper, facilitate the lasting of narrow toed shoes. In lasting around such narrow toes, and particularly in lasting the point and the second side of the toe, this rest is enabled to take a suitable position without overlying, prying under, or otherwise disturbing or displaclng the previously lasted portions.

In the use of the machine a shoe may be presented to the lasting and tacking devices as shown in the drawings where the grippers 52, by repeated operations applied to successive portions of the shoe, progressively work the upper into lasted position over the last bottom. A tack previously separated is delivered and driven and another tack is separated in each'cycle. \Vhen the shoe is withdrawn from tack receiving position, permitting the feeler to descend, the gate 60 assumes a posit-ion to stop in transit the tack which has been or is being separated so that it is not driven and then wasted, and the clamp 55 arrests the descent of the tacks in the raceway, preventing another tack from entering the separator. hen the shoe is again presented to the machine the feeler is lifted, withdrawing the gate 60 to permit the tack therein to proceed immediately to driving position, and the clamp is lifted to let the end tack slide down into the seat 13 of the separator. This gives the driver a tack to insert during the first cycle and provides for the separation of a tack which will be fed to position to be driven in the next cycle. Vi hen the machine is to be used without driving tacks the arm 40 may be turned down so that the tacks will not be released by the presentation of the work if the foot 4:1 is not required for resting the shoe. If this foot is to serve as the shoe bottom rest the lock 50 will be set to hold the foot from operating the tack-controlling devices and may be used as shown in Fig. 4. If it is desired to discontinue the control of the tacksupplying means by the described parts and employ the foot 4:1 as the shoe bottom rest the locking device can be set to hold the rest up with the several parts in the position shown in Fig. 1.

Having explained the nature of this invention and described a preferred embodiment thereof, I claim as new and desire to secure by Letters Patent of the United States:

1. A machine of the class described having, in combination, an inclined raceway in which tacks are suspended by their heads and down which they are advanced, a driver, means for delivering tacks from the raceway into the path of the driver, means movable perpendicularly to the head of the tack for stopping the advance of the tack in the raceway, and means governed by the position of the work in the machine for lifting the tackstopping means.

2. A machine of the class described having, in combination, an inclined raceway in which tacks are suspended by their heads and down which they are advanced, a driver, means for delivering the tacks from the raceway into the path of the driver, means for clamping the head of the endmost tack upon the supporting face of the raceway, and means arranged to be shifted in presenting the work in tack-receiving position for causing the clamp to release the tack.

3. A machine of the class described having, in combination, an inclinedraceway in which tacks are suspended by their heads and down which they are advanced, a driver, means for delivering the tacks from the raceway into the path of the driver, and additional means for stopping the feeding of tacks while the delivering means may continue in motion, said additional means including a clamp movably supported over the tacks and having a beveled edge adapted to be forced downwardly between two ad jacent tacks, and a face to engage the heads of the tacks.

4. A machine of the class described having, in combination, an inclined raceway in which tacks are suspended by their heads and down which they are advanced, a driver, means for delivering the tacks from the raceway into the path of the driver, and additional means to be used at times to stop the delivery of tacks and comprising a clamp having a portion to extend in front of the first tack in the raceway and a portion to overlie the heads of a plurality of adjacent tacks and prevent them from overriding one another.

5. A machine of the class described having, in combination, an inclined raceway in which tacks are suspended by their heads and down which they are advanced, adriver, means for delivering the tacks from the raceway into the path of the driver, a cover to overlie the heads of the tacks in the raceway and prevent them from overriding one another, said cover having arecess, and additional means adapted to be used at times to stop the delivery of tacks and comprising a tack stop movable in said recess in the cover to control the delivery of tacks.

6. A machine of the class described having, in combination, an inclined raceway in which tacks are suspended by their heads and down which they are advanced, a driver, means for delivering the tacks from the raceway into the path of the driver, a stop for engaging the head of the first tack in the raceway, a spring arranged to lift the stop, a part arranged to occupy the position of the shoe when no shoe is in the machine and having connections for depressing the stop into operative position against the ten sion of the lifting spring at such times.

7. In a tacking machine, tack supplying mechanism, including devices for separating tacks and delivering them singly and a part having a passageway through which the separated tacks are dropped on their way to driving position, in combination with a gate in the passage normally closed, and means to open the gate actuated by en gagement with the work.

8. In a tacking machine, in combination, tack feeding mechanism, including devices for separating tacks and delivering them singly and a part having a passageway through which the separated tacks are dropped on their way to driving position; a gate therein; a lever operating the gate; there being means forcing said lever yield; ingly into the operative position of the work thereby closing the gate, displacement of the lever from said position by the work opening the gate.

9. A machine of the class described having, in combination, taclrseparat-ing means and tack-delivering means, a tack passage along which the tacks progress from the separating to the delivering means, and a stop for arrest-ing the progress of the tacks into the separating means, a gate for arresting the discharge of the tack that may be in the separating means, and means adapted to be actuated independently of the regular operation of the machine for operating the stop and the gate.

10. A machine of the class described having, in combination, tack-separating means and tack-delivering means, a tack passage along which the tacks progress from the separating to the delivering means, and a gate controlled by the position of the work for determining the delivery of tacks through said passage.

11. A machine of the'class described having, in combination, an inclined raceway in which tacks are suspended by their heads and down which they are advanced, a driver, means for delivering the tacks from the raceway into the path of the driver, a stop for engaging the head of the first tack in the raceway, a spring arranged to lift the stop, a lever arranged to hold the stop depressed and to be shifted by the work to permit the lifting spring to act at certain times to raise the stop and permit the discharge of the first tack from the raceway.

12. A machine of the class described having, in combination, an inclined raceway in which tacks are suspended by their heads and down which they are advanced, a driver, means for delivering the tacks from the raceway into the path of the driver, the tack stop 55, the spring 58 arranged to lift the stop, the lever having the arm 59 to depress the tack stop, and the foot 41 arranged to be engaged by the work to raise the arm 59 when the work is placed in tackreceiving position.

18. A machine of the class described having, in combination, a driver, means for supplying fastenings including a separator, and mechanism for interrupting the delivery and insertion offastenings independently of the running of the machine, said mechanism including means for arresting the progress of the fastenings into the separator and means arranged to be operative or inoperative according to the position of the work and adapted to hold a separated tack in position to be presented to the driver in the first descent thereof after the delivery of tacks is resumed.

14:. A machine of the class described having, in combination, a driver, means for separating tacks, and means controlled by the position of the work for holding in transit and out of driving position during repeated operations of the machine a sepa rated tack and for discontinuing the separation of other tacks while said separated tack is so held.

15. A machine of the class described having, in combination, mechanism for feeding tacks including a raceway and a separator, and means controlled by the position of the work for stopping the feeding of tacks including a clamp which is free to become effective for holding the tack next to the separator at any point in the machines operation at which it is actuated.

16. A machine of the class described having, in combination, a tack driver, continuously running mechanism for actuating the driver, mechanism for-feeding tacks having a tack passage located to receive the separated tack, a gate arranged to shut the passage below the separated tack whereby said tack may be held from delivery during a plurality of cycles of the driver actuating mechanism, and means for opening the gate when the work is presented and holding it open during a plurality of cycles of the said mechanism.

17. A machine of the class described having, in combination, mechanism for feeding tacks including a raceway, a clamp for engaging the endmost tack in the raceway, and means controlled by the position of the work for operating the clamp.

18. A machine of the class described having, in combination, a driver, means for supplying tacks including a tack separator, and means under control of the operator for interrupting the delivery of tacks including means for stopping the progress of tacks to the separator and means for holding a tack that may be in the separator from presentation to the driver.

19. A inaehine of the class described, having, in combination, a driver, means for supplying tacks including a tack separator, and means under control of the operator for interrupting the delivery of tacks including means for stopping the progress of tacks to the separator and means for preventing a tack which may be in transit to the driver from being delivered into position to be driven.

20. A machine of the class described, having, in combination, a driver, means for .supplying tacks including a tack separator and a continuously running tack carrier, and means under control of the operator for interrupting the delivery and insertion of tacks including means for arresting the advance of the tacks to the separator and means for holding a separated tack in transit to the tack carrier.

21. A machine of the class described having, in combination, a driver, means for supplying tacks including a tack separator, and means additional to the supplying and driving means and controlled by the position of the work for discontinuing the separation of tacks and for holding in transit and out of the driver path a tack which has been separated.

22. A machine of the class described, having, in combination, a driver, means for supplying tacks including a tack separator, a tack carrier, a passage for the tacks from the separator to the carrier, a gate for said passage, and means under control of the operator for discontinuing the separation of tacks and closing the gate to hold'in transit a separated tack.

23. A machine of the class described, having, in combination, a raceway, a tack separator, the tack stop 55, the gate 60, the lever 40, and suitable connections for operating the stop and'the gate from the lever.

24:. A machine of the class described, having, in combination, means for feeding tacks, a tack carrier, a tack passage to conduct the tacks to the carrier, a gate in the passage, means for closing the gate, and an operating device extending into the normal tack-receiving position of the work to be actuated thereby to open the gate when the work is in tack-receiving position.

25. A machine of the class described, having, in combination, mechanism for supplying tacks in position to be driven including tack-separating means, said mechanism being arranged to begin the separation of a tack during one cycle of the machines operation and to present the tack in position to be driven during a subsequent cycle, manually controlled means for causing the feeding of tacks to the separating means to be discontinued and resumed, and means for -holding in transit during repeated operations of the driver a separated tack while the feeding of the tacks is discontinued.

26. A machine of the class described, having, in combination, mechanism for supplying tacks in position to be driven including tack-separating means, said mechanism being arranged to begin the separation of a tack during one cycle of the machines operation and to present the tack in position to be driven during a subsequent cycle, and means additional to the tack supplying and driving means controlled by the position of the work for discontinuing the feeding of tacks and preventing the presentation of a previously separated tack.

27. A machine of the class described having, in combination, mechanism for feeding tacks, and means for causing the feeding to be discontinued while the machine continues to run, said means including a part which can be adjusted into position to be shifted by the work for causing the delivery of tacks to be resumed.

28. A machine of the class described hav ing, in combination, mechanism for separating and delivering tacks, and means for causing the separating and delivering to be discontinued, said means including a member independent of the tacking instrumentalities which is adjustable into position to be moved by the work for causing the delivery of tacks to be resumed whenever the work is in position to receive the tacks.

29. A machine of the class described having, in combination, means for supplying tacks, and cont-rolling means therefor hav ing a part which can be adjusted into the operative position of the work where it will be shifted in one direction for starting the tacks when the work is presented and shifted for stopping the tacks when the work is withdrawn.

30. A machine of the class described having, in combination, means for supplying tacks, and controlling means therefor having the adjustable member 40 adapted to be moved from and toward position where it will be engaged by the work.

31. A machine of the class described having, in combination, mechanism for feeding and driving tacks in succession during continuous operation of the machine, and means normally controlled by the position of the shoe for determining whether or not tacks shall be fed, said machine having provision for rendering said means inoperative.

32. A machine of the class described having, in combination, mechanism for feeding and driving tacks in succession during continuous operation of the machine, and means normally controlled by the position of the shoe for permitting tacks to be fed when a shoe is in position to receive tacks and stopping the feed of tacks when the shoe is withdrawn, said machine having provision for rendering the said means inoperative to start the feeding of tacks when the shoe is in tack-receiving position.

38. A machine of the class described having, in combination, mechanism for feeding and driving tacks in succession during continuous operation of the machine, and means for normally controlling the feeding of tacks according to the position of the work, said machine having provision for rendering said means inoperative.

34. A machine of the class described having, in combination, mechanism for supplying fastenings, including a reciprocating carrier for presenting the fastenings in position to be driven, a driver for inserting the fastenings, and manually controlled mechanism constructed and arranged to interrupt the delivery of fastenings without stopping the reciprocation of the carrier and the driver and adapted to cause a fastening to be presented for driving in the first descent of the driver after the delivering operation is resumed.

35. In a machine having a driver and mechanism for supplying fastenings in position to be driven, said mechanism includ ing a movable carrier for presenting the fastenings in position to be driven and being arranged to begin the separation of a fastening during one cycle of the machines operation and to present that fastening in position to be driven during a subsequent cycle, means for causing the separation of fastenings to be suspended and resumed while the carrier and driver continue in op eration, said means being constructed and arranged to cause the presentation of a fastening in position to be driven during the same cycle of the machines operation in which it is set to resume separation.

36. In a machine of the class described, mechanism for supplying fastenings in position to be driven and driving a plurality of fastenings in succession during continuous operation of the machine, said mechanism being arranged to begin the separation of a fastening during one cycle of the machines operation and to deliver that fastening in position to be driven during a subsequent cycle, and means for suspending the separation of fastenings while the machine continues in operation, said machine having provision for simultaneously suspending also the delivering of fastenings so that the fastening in course of delivery is reserved to be driven when the delivery of fastenings is resumed.

37. In a machine of the class described, mechanism for supplying fastenings in po sition to be driven and for driving a plu rality of fastenings in uninterrupted succession, said mechanism being arranged to begin the separation of a fastening during one cycle of the machines operations and to deliver that fastening in position to be driven during a subsequent cycle, and means for suspending the separation of fastenings While the machine continues in operation, said machine having provision for retaining a fastening in transit and to deliver that fastening and present it in position to be driven during the cycle of the machines operation in which the supplying of fastenings is resumed.

38. A machine of the class described having, in combination, mechanism for feeding tacks, actuating mechanism therefor and means including a shoe bottom rest normally responsive to the presentation of the shoe in tack receiving position to cause the feeding mechanism to supply tacks, said machine having provision for rendering said means non-responsive to such presentation of the shoe, while the rest continues operative for positioning the shoe.

39. A. machine of the class described having, in combination, mechanism for feeding tacks, additional means independent of the feeding mechanism for controlling the feed ing of tacks, and means to permit said firstmentioned means to be rendered operative 'or inoperative.

trolling means in operative or inoperative relation to the feeding mechanism.

41. A machine of the class described having, in combination, mechanism for feeding tacks, means adapted to rest the shoe and be shifted thereby for controlling the tackfeeding mechanism, and means for locking the shoe rest.

42. A machine of the class described having, in combination, tack driving mechanism, a tack raceway, means normally controlled by the position of the work to cause delivery of tacks from the raceway to the driving mechanism to be stopped whenever the work is withdrawn from tack receiving position, and means to lock said stopping means against such control.

43. A machine arranged to drive a succession of tacks during continuous operation having, in combination, a raceway, tack separating and delivering mechanism, and means arranged to arrest automatically the progress of the tacks on their way through said separating and delivering mechanism when the work is withdrawn without interrupting the movements of the tack separating and delivering and tack driving devices.

44. A machine arranged to drive a succession of tacks during continuous operation having, in combination, tack supplying mechanism including a raceway, driven tack separating mechanism, and means controlled by the position of the Work for arresting the progress of the tack that may be in the separating mechanism Without interrupting the movements of that mechamsm;

4L5. A machine arranged to drive a succession of tacks during continuous operation having, in combination, suitable actuat-ing mechanism, a tack separating mechanism, a driver, a'tack block movable from tack receiving position relative to the separating mechanism to a position under the driver, and means controlled by the position of the work for arresting during continued operation of the actuating mechanism the delivery to the tack block of a tack which is in the separating mechanism.

46. In a tacking machine, tack supplying mechanism including a part having a passageway through which the tacks are delivered point first, in combination with a gate normally closing the passageway and arranged to support a tack by its point, and means actuated by engagement with the Work to move the gate for discharging the tack.

4-7. In a tacking machine, tack supplying mechanism including a part having a passageway through which the tacks are delivered point first, a tack carrier arranged to receive the tack from the passageway and deliver it into position to be driven, and a gate arranged to extend across the passageway to support a tack by its point and controlled as to position by the relation of the work to the machine.

48. A machine of the class described hav ing, in combination with a tack driver, suit able actuating mechanism, a tack raceway, means operating normally for automatically arresting the progress of tacks from the raceway t0 the driver when the shoe is withdrawn from tack receiving position, and means adapted to be adjusted to allow the flow of tacks when the shoe is withdrawn.

49. A machine of the class described having, in combination, a tacker reciprocating transversely across the edge of the shoe and a shoe bottom rest 40 extending forwardly then obliquely, downwardly and laterally from one side of the t acker to a point in front of the tacker and mounted to swing downwardly and backwardly to an inoperative position as and for the purpose described.

50. A machine of the class described having, in combination, a tack driver, a reciprocating tack carrier, a tack raceway, a tack separator, a two arm lever one of which arms has-operative connection with the separator to reciprocate it, a cam on the carrier to engage the other arm of the lever to move the lever in one direction, a spring to return the lever, and means arranged to be controlled by the shoe as the shoe is moved out of tack receiving position to clamp the head of the lowermost tack in the raceway.

51. A machine of the class described having, in combination, a tack driver, a reciprocating tack carrier, a tack raceway, a tack separator, a two arm lever one of which arms has operative connection with the separator to reciprocate it, a cam on the carrier to engage the other arm of the lever to move the lever in one direction, a spring to re turn the lever and means arranged to be controlled by the shoe as the shoe is moved out of tack receiving position to bar the passage of a tack from the separator to the tack carrier.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARVID L. ENGBERG. lVit-nesses HARRY M. WILLIAMS, ARTHUR L. RUSSELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

